EP 1481541 A1 20041201 - NOISE FILTERING IN IMAGES
Title (en)
NOISE FILTERING IN IMAGES
Title (de)
RAUSCHFILTERUNG VON BILDERN
Title (fr)
FILTRAGE DU BRUIT DANS DES IMAGES
Publication
Application
Priority
- EP 03701675 A 20030207
- EP 02075804 A 20020228
- IB 0300468 W 20030207
Abstract (en)
[origin: WO03073750A1] A temporal recursive filter unit (100,200,300,400) for noise filtering of a series of input images resulting in a series of output images comprises: means (102) for determining a value of a weighing factor, on basis of a difference between a first value of a first pixel of an input image and a second value of a second pixel of a first output image; and an adding (104) unit for calculating a third value of a third pixel of a second output image by adding of a first product of the value of the weighing factor and the first value of the first pixel, to a second product of a complement of the value of the weighing factor and the second value of the second pixel. The value (508) of the weighing factor is higher below a predetermined threshold (506) than above the threshold (506).
IPC 1-7
IPC 8 full level
CPC (source: EP US)
H04N 5/21 (2013.01 - EP US)
Citation (search report)
See references of WO 03073750A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR
DOCDB simple family (publication)
WO 03073750 A1 20030904; AU 2003202764 A1 20030909; CN 1640113 A 20050713; EP 1481541 A1 20041201; JP 2005519379 A 20050630; US 2005117814 A1 20050602
DOCDB simple family (application)
IB 0300468 W 20030207; AU 2003202764 A 20030207; CN 03804841 A 20030207; EP 03701675 A 20030207; JP 2003572295 A 20030207; US 50549604 A 20040824